Help me please it's multiple choice if you actually try I will give you brainliest if you don't I will report you

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Explanation:

ill try

neutrons are in the middle of the atom and the electrons, which are much smaller.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l